Semiconductor arrangement and formation thereof

ABSTRACT

A semiconductor arrangement and method of formation are provided. The semiconductor arrangement includes a MEMS device in a MEMS area, where a first metal layer is connected to a first metal connect adjacent the MEMS area and a cap is over the MEMS area to vacuum seal the MEMS area. A first wafer portion is over and bonded to the first metal layer which connects the first metal connect to a first I/O port using metal routing. The first metal layer and the first wafer portion bond requires 10% less bonding area than a bond not including the first metal layer. The semiconductor arrangement including the first metal layer has increased conductivity and requires less processing than an arrangement that requires a dopant implant to connect a first metal connect to a first I/O port and has a better vacuum seal due to a reduction in outgassing.

BACKGROUND

A semiconductor arrangement comprises one or moremicro-electro-mechanical system (MEMS) devices. In a MEMS device, suchas a pressure sensor, generally at least two of sensing, processing oractuating functions are combined on a single microchip.

BRIEF DESCRIPTION OF THE DRAWINGS

Aspects of the present disclosure are best understood from the followingdetailed description when read with the accompanying figures. It isnoted that, in accordance with the standard practice in the industry,various features are not drawn to scale. In fact, the dimensions of thevarious features may be arbitrarily increased or reduced for clarity ofdiscussion.

FIG. 1 is a flow diagram illustrating a method of forming asemiconductor arrangement, in accordance with some embodiments.

FIG. 2 is an illustration of a semiconductor arrangement, in accordancewith some embodiments.

FIG. 3 is an illustration of a semiconductor arrangement, in accordancewith some embodiments.

FIG. 4 is an illustration of a semiconductor arrangement, in accordancewith some embodiments.

FIG. 5 is an illustration of a semiconductor arrangement, in accordancewith some embodiments.

FIG. 6 is an illustration of a semiconductor arrangement, in accordancewith some embodiments.

FIG. 7 is an illustration of a semiconductor arrangement, in accordancewith some embodiments.

FIG. 8 is an illustration of a semiconductor arrangement, in accordancewith some embodiments.

FIG. 9 is an illustration of a semiconductor arrangement, in accordancewith some embodiments.

DETAILED DESCRIPTION

The following disclosure provides many different embodiments, orexamples, for implementing different features of the provided subjectmatter. Specific examples of components and arrangements are describedbelow to simplify the present disclosure. These are, of course, merelyexamples and are not intended to be limiting. For example, the formationof a first feature over or on a second feature in the description thatfollows may include embodiments in which the first and second featuresare formed in direct contact, and may also include embodiments in whichadditional features may be formed between the first and second features,such that the first and second features may not be in direct contact. Inaddition, the present disclosure may repeat reference numerals and/orletters in the various examples. This repetition is for the purpose ofsimplicity and clarity and does not in itself dictate a relationshipbetween the various embodiments and/or configurations discussed.

Further, spatially relative terms, such as “beneath,” “below,” “lower,”“above,” “upper” and the like, may be used herein for ease ofdescription to describe one element or feature's relationship to anotherelement(s) or feature(s) as illustrated in the figures. The spatiallyrelative terms are intended to encompass different orientations of thedevice in use or operation in addition to the orientation depicted inthe figures. The apparatus may be otherwise oriented (rotated 90 degreesor at other orientations) and the spatially relative descriptors usedherein may likewise be interpreted accordingly.

One or more techniques for forming a semiconductor arrangement andresulting structures formed thereby are provided herein.

A method 100 of forming a semiconductor arrangement 200 according tosome embodiments is illustrated in FIG. 1 and one or more structuresformed thereby at various stages of fabrication are illustrated in FIGS.2-9. According to some embodiments, such as illustrated in FIG. 9, thesemiconductor arrangement 200 comprises a first metal connect 204 aadjacent a second metal connect 204 b on a substrate 202. In someembodiments, a first oxide layer 206 a is over the first metal connect204 a and a second oxide layer 206 d is over the second metal connect204 b. In some embodiments, a first metal layer 210 a is over the firstoxide layer 206 a, such that a portion 207 a of the first metal layer210 a is in contact with a top surface 205 a of the first metal connect204 a, as illustrated in FIG. 4. In some embodiments, a second metallayer 210 b is over the second oxide layer 206 d, such that a portion207 b of the second metal layer 210 b is in contact with a top surface205 b of the second metal connect 204 b, as illustrated in FIG. 4. Insome embodiments, the first metal layer 210 a and the second metal layer210 b comprise titanium. In some embodiments, a micro-electro-mechanicalsystem (MEMS) area 209 is between the first metal layer 210 a and thesecond metal layer 210 b, as illustrated in FIG. 9. In some embodiments,the MEMS area 209 comprises a MEMS device 203 c. In some embodiments, afirst wafer portion 203 a comprising silicon is bonded to the firstmetal layer 210 a by a titanium silicon bond and a second wafer portion203 b comprising silicon is bonded to the second metal layer 210 b by atitanium silicon bond. In some embodiments, a cap 218 is connected overa top surface 225 a of the first wafer portion 203 a by a first bond andconnected over a top surface 225 b of the second wafer portion 203 b bya second bond. In some embodiments, the first bond comprises a firsteutectic bond between a first bonding pad 212 b and a first cap bondingpad 220 a of the cap 218. In some embodiments, the first bonding pad 212b is on the top surface 225 a of the first wafer portion 203 a andcomprises at least one of aluminum or copper. In some embodiments, thefirst cap bonding pad 220 a comprises germanium. In some embodiments,the second bond comprises a second eutectic bond between a secondbonding pad 212 e and a second cap bonding pad 220 b of the cap 218. Insome embodiments, the second bonding pad 212 e is on the top surface 225b of the second wafer portion 203 b and comprises at least one ofaluminum or copper. In some embodiments, the second cap bonding pad 220b comprises germanium. In some embodiments, connecting the cap 218vacuum seals the MEMS area 209, and thus the MEMS device 203 c therein.In some embodiments, a first I/O port 224 a comprises a first glue pad222 a comprising at least one of titanium or nitride over a first metalpad 212 a comprising at least one of aluminum or copper, the first metalpad 212 a on the top surface 225 a of the first wafer portion 203 aadjacent the cap 218 outside of the MEMS area 209. In some embodiments,a second I/O port 224 b comprises a second glue pad 222 b comprising atleast one of titanium or nitride over a second metal pad 212 fcomprising at least one of aluminum or copper, the second metal pad 212f on the top surface 225 b of the second wafer portion 203 b adjacentthe cap 218 outside of the MEMS area 209. In some embodiments, at leastone of a first metal routing (not shown) connects the first metal layer210 a to the first I/O port 224 a or second metal routing (not shown)connects the second metal layer 210 b to the second I/O port 224 b. Insome embodiments, the bond between the first metal layer 210 a and thefirst wafer portion 203 a requires between about 5% to about 10% lessbonding area than a bond that is not between a first metal layer and afirst wafer portion. In some embodiments, the first metal layer 210 aand the second metal layer 210 b increase the conductivity of thesemiconductor arrangement 200, as compared to an arrangement that lacksat least one of a first metal layer or a second metal layer. In someembodiments, the semiconductor arrangement 200 comprising the firstmetal layer 210 a connecting via a first metal routing the first metalconnect 204 a to the first I/O port 224 a requires less processing thana device that requires a dopant implant to connect a first metal connectto a first I/O port. Further, a semiconductor device that does notrequire a dopant implant to connect a first metal connect to a first I/Oport has at least one of an enhanced first bond or an enhanced secondbond and thus a greater vacuum seal, due to a reduction in outgassing ascompared to a semiconductor arrangement that requires the dopantimplant.

At 102, an initial oxide layer 206 is patterned to form the first oxidelayer 206 a over the first metal connect 204 a and the second oxidelayer 206 d over the second metal connect 204 b, as illustrated in FIG.4. Turning to FIG. 2, prior to FIG. 4, the first metal connect 204 a isadjacent the second metal connect 204 b over the substrate 202,according to some embodiments. In some embodiments, the substrate 202comprises at least one of silicon or germanium. According to someembodiments, the substrate 202 comprises at least one of an epitaxiallayer, a silicon-on-insulator (SOI) structure, a wafer, or a die formedfrom a wafer. In some embodiments, the substrate 202 comprises at leastone CMOS device. In some embodiments, at least one of the first metalconnect 204 a or the second metal connect 204 b comprises at least oneof aluminum or copper. In some embodiments, at least one of the firstmetal connect 204 a or the second metal connect 204 b has a metal layerthickness between about 2 Å to about 16 Å. In some embodiments, aninitial oxide layer 206 is formed over the first metal connect 204 a andthe second metal connect 204 b, as illustrated in FIG. 3. In someembodiments, the initial oxide layer 206 comprises oxide. In someembodiments, the initial oxide layer 206 is formed by deposition. Insome embodiments, the initial oxide layer 206 has an initial oxidethickness between about 1800 Å to about 2400 Å. In some embodiments, theinitial oxide layer 206 is patterned to form the first oxide layer 206a, the second oxide layer 206 d, a first bump layer 206 b and a secondbump layer 206 c, the first bump layer 206 b between the first oxidelayer 206 a and the second bump layer 206 c on the substrate 202 and thesecond bump layer 206 c between the second oxide layer 206 d and thefirst bump layer 206 b on the substrate 202. In some embodiments, atleast one of the first oxide layer 206 a or the second oxide layer 206 dhas an oxide layer thickness between about 1200 Å to about 1800 Å. Insome embodiments, at least one of the first bump layer 206 b or thesecond bump layer 206 c has a bump layer thickness between about 5 Å toabout 50 Å.

At 104, a first opening 208 a is formed through the first oxide layer206 a over the first metal connect 204 a and a second opening 208 b isformed through the second oxide layer 206 d over the second metalconnect 204 b, as illustrated in FIG. 4, according to some embodiments.In some embodiments, the first opening 208 a exposes the top surface 205a of the first metal connect 204 a and the second opening 208 b exposesthe top surface 205 b of the second metal connect 204 b. In someembodiments, at least one of the first opening 208 a or the secondopening 208 b are formed by etching.

At 106, an initial metal layer 210 is formed over the first oxide layer206 a, the second oxide layer 206 d, the first opening 208 a, and thesecond opening 208 b, as illustrated in FIG. 5, according to someembodiments. In some embodiments, the initial metal layer 210 is formedover the substrate 202, the first bump layer 206 b and the second bumplayer 206 c in the MEMS area 209. In some embodiments, the initial metallayer 210 is formed by deposition. In some embodiments, the initialmetal layer 210 is formed conformally to the first oxide layer 206 a,the second oxide layer 206 d, the first opening 208 a, the secondopening 208 b, the substrate 202, the first bump layer 206 b and thesecond bump layer 206 c. In some embodiments, the initial metal layer210 comprises titanium. In some embodiments, the initial metal layer 210has a metal layer thickness between about 100 Å to about 7,000 Å.

At 108, a portion of the initial metal layer 210 is removed from theMEMS area 209, such that the first metal layer 210 a is formed over thefirst oxide layer 206 a and the second metal layer 210 a is formed overthe second oxide layer 206 d, as illustrated in FIG. 6, according tosome embodiments. In some embodiments, the portion of the initial metallayer 210 is removed by etching. In some embodiments, removing theportion of the initial metal layer 210 exposes the first bump layer 206b and the second bump layer 206 and the substrate 202 in the MEMS area209. In some embodiments, the first metal layer 210 a has a first metalthickness between about 100 Å to about 7,000 Å. In some embodiments, thesecond metal layer 210 b has a second metal thickness between about 100Å to about 7,000 Å. In some embodiments, the portion 207 a of the firstmetal layer is in contact with the top surface 205 a of the first metalconnect 204 a. In some embodiments, the portion 207 b of the secondmetal layer is in contact with the top surface 205 b of the second metalconnect 204 b.

At 110, a wafer 203 comprising a MEMS device 203 c is bonded over thefirst metal layer 210 a and the second metal layer 210 b, as illustratedin FIG. 7, according to some embodiments. In some embodiments, the wafer203 comprises at least one of an epitaxial layer, a silicon-on-insulator(SOI) structure, a wafer, or a die formed from a wafer. In someembodiments, the wafer 203 comprises silicon. In some embodiments, thewafer 203 is bonded to the first metal layer 210 a and the second metallayer 210 b by a titanium-silicon wafer bond. In some embodiments, afirst vacancy is formed between a top surface 211 a of the portion 207 aof the first metal layer 210 a and a first wafer portion bottom surface213 a of the first wafer portion 203 a. In some embodiments, a secondvacancy is formed between a top surface 211 b of the portion 207 b ofthe second metal layer 210 b and a second wafer portion bottom surface213 b of the second wafer portion 203 b. In some embodiments, an initialmetal pad comprising at least one of aluminum or copper is formed overthe wafer 203. In some embodiments, the initial metal pad is patternedto form the first metal pad 212 a, the first bonding pad 212 b, a firstsquish prevention node 212 c, a second squish prevention node 212 d, thesecond bonding pad 212 e and the second metal pad 212 f. In someembodiments, the first metal pad 212 a and the first bonding pad 212 bare on a first side 216 a of the MEMS device 203 c outside the MEMS area209, such that that the first bonding pad 212 b is between the firstsquish prevention node 212 c and the first metal pad 212 a. In someembodiments, the second metal pad 212 f and the second bonding pad 212 eare on a second side 216 b of the MEMS device 203 c outside the MEMSarea 209, such that that the second bonding pad 212 e is between thesecond squish prevention node 212 d and the second metal pad 212 f. Insome embodiments, the first squish prevention node 212 c and the secondsquish prevention node 212 d are in the MEMS area 209. In someembodiments, the first glue pad 222 a comprising at least one oftitanium or nitride is formed over the first metal pad 212 a to form thefirst I/O port 224 a. In some embodiments, the second glue pad 222 bcomprising at least one of titanium or nitride is formed over the secondmetal pad 212 f to form the second I/O port 224 b. In some embodiments,at least one of the first metal routing (not shown) connects the firstmetal connect 204 a via the first metal layer 210 a to the first I/Oport 224 a or the second metal routing (not shown) connects the secondmetal connect 204 b via the second metal layer 210 b to the second I/Oport 224 b. In some embodiments, at least one of the first I/O port 224a or the second I/O port 224 b comprises an input port for thesemiconductor arrangement 200. In some embodiments, at least one of thefirst I/O port 224 a or the second I/O port 224 b comprises an outputport for the semiconductor arrangement 200.

At 112, a first MEMS opening 214 a is formed on the first side 216 a ofthe MEMS device 203 c to form the first wafer portion 203 a on the firstside 216 a of the MEMS device 203 c and a second MEMS opening 214 b isformed on the second side 216 b of the MEMS device 203 c to form thesecond wafer portion 203 b on the second side 216 b of the MEMS device203 c, as illustrated in FIG. 8, according to some embodiments. In someembodiments, a first squish prevention opening 226 a is formed in theMEMS area 209 between the first squish prevention node 212 c and thefirst bonding pad 212 b, to form a first squish prevention region 228 acomprising the first squish prevention node 212 c and the first squishprevention opening 226 a. In some embodiments, a second squishprevention opening 226 b is formed in the MEMS area 209 between thesecond squish prevention node 212 d and the second bonding pad 212 e, toform a second squish prevention region 228 b comprising the secondsquish prevention node 212 d and the second squish prevention opening226 b. In some embodiments, at least one of the first MEMS opening 214a, the second MEMS opening 214 b, the first squish prevention opening226 a or the second squish prevention opening 226 b are formed byetching. In some embodiments, the MEMS device 203 a is separated fromthe first wafer portion 203 a and the second wafer portion 203 b by thefirst MEMS opening 214 a and the second MEMS opening 214 b, such thatthe first MEMS opening 214 a and the second MEMS opening 214 b gothrough the wafer 203. In some embodiments, the MEMS device 203 a isattached to an anchor (not shown), such that the MEMS device 203 a doesnot fall when the first MEMS opening 214 a and the second MEMS opening214 b are formed.

At 114, the cap 218 is connected over the top surface 225 a of the firstwafer portion 203 a and over the top surface 225 b of the second waferportion 203 b, as illustrated in FIG. 9, according to some embodiments.In some embodiments, the cap 218 comprises silicon. In some embodiments,the cap 218 is connected to the top surface 225 a of the first waferportion 203 a by the first bond and connected to the top surface 225 bof the second wafer portion 203 b by the second bond. In someembodiments, the first bond comprises the first eutectic bond betweenthe first bonding pad 212 b and the first cap bonding pad 220 a of thecap 218. In some embodiments, the first bonding pad 212 b is on the topsurface 225 a of the first wafer portion 203 a and comprises at leastone of aluminum or copper. In some embodiments, the first cap bondingpad 220 a comprises germanium. In some embodiments, the second bondcomprises the second eutectic bond between the second bonding pad 212 eand the second cap bonding pad 220 b of the cap 218. In someembodiments, the second bonding pad 212 e is on the top surface 225 b ofthe second wafer portion 203 b and comprises at least one of aluminum orcopper. In some embodiments, the second cap bonding pad 220 b comprisesgermanium. In some embodiments, some of the first bonding pad 212 b willsquish toward the first squish prevention region 226 a during theformation of the first eutectic bond. In some embodiments, the firstsquish prevention region 226 a prevents the squished first bonding pad212 b material from migrating to the substrate 202. In some embodiments,some of the second bonding pad 212 e will squish toward the secondsquish prevention region 226 b during the formation of the secondeutectic bond. In some embodiments, the second squish prevention region226 b prevents the squished second bonding pad 212 e material frommigrating to the substrate 202. In some embodiments, at least one of thefirst eutectic bond is between at least one of germanium, aluminum orcopper or the second eutectic bond is between at least one of germanium,aluminum or copper. In some embodiments, the cap 218 is vacuum sealed,such that there is little to no air in the MEMS area 209. In someembodiments, the semiconductor arrangement 200 comprises at least one ofa motion sensor, a pressure sensor, a radio sensor, or an accelerometer.In some embodiments, the bond between the first metal layer 210 a andthe first wafer portion 203 a requires between about 5% to about 10%less bonding area than a bond that is not between a first metal layerand a first wafer portion. In some embodiments, the first metal layer210 a and the second metal layer 210 b increase the conductivity of thesemiconductor arrangement 200, as compared to an arrangement that lacksat least one of a first metal layer or a second metal layer. In someembodiments, the semiconductor arrangement 200 comprising the firstmetal layer 210 a connecting via a first metal routing the first metalconnect 204 a to the first I/O port 224 a requires less processing thana device that requires a dopant implant to connect a first metal connectto a first I/O port. Further, a semiconductor device that does notrequire a dopant implant to connect a first metal connect to a first I/Oport has at least one of an enhanced first bond or an enhanced secondbond and thus a greater vacuum seal, due to a reduction in outgassing ascompared to a semiconductor arrangement that requires the dopantimplant.

According to some embodiments, a semiconductor arrangement comprises afirst metal connect adjacent a second metal connect, the first metalconnect and the second metal connect over a substrate and a first metallayer is over the first metal connect such that a portion of the firstmetal layer is in contact with a top surface of the first metal connect.In some embodiments, a second metal layer is over the second metalconnect such that a portion of the second metal layer is in contact witha top surface of the second metal connect. In some embodiments, a microelectro-mechanical system (MEMS) area is between the first metal layerand the second metal layer, the MEMS area comprising a MEMS device. Insome embodiments, a first wafer portion is bonded to the first metallayer over the first metal connect and a second wafer portion is bondedto the second metal layer over the second metal connect. In someembodiments, a cap is connected to a top surface of the first waferportion by a first bond and connected to a top surface of the secondwafer portion by a second bond, such that the cap goes over the MEMSarea.

According to some embodiments, a method of forming a semiconductorarrangement comprises patterning an initial oxide layer to form a firstoxide layer over a first metal connect and a second oxide layer over asecond metal connect, where the first metal connect is adjacent thesecond metal connect on a substrate. According to some embodiments, themethod of forming a semiconductor arrangement further comprises forminga first opening through the first oxide layer over the first metalconnect, such that a top surface of the first metal connect is exposedand forming a second opening through the second oxide layer over thesecond metal connect, such that a top surface of the second metalconnect is exposed. According to some embodiments, the method of forminga semiconductor arrangement further comprises forming an initial metallayer conformally over the first oxide layer, the second oxide layer,the first opening, the second opening and a micro electro-mechanicalsystem (MEMS) area between the first oxide layer and the second oxidelayer, such that a portion of a first metal layer of the initial metallayer is in contact with the top surface of the first metal connect anda portion of a second metal layer of the initial metal layer is incontact with the top surface of the second metal connect. According tosome embodiments, the method of forming a semiconductor arrangementfurther comprises removing a portion of the initial metal layer from theMEMS area such that the first metal layer of the initial metal layer isformed over the first oxide layer and the second metal layer of theinitial metal layer is formed over the second oxide layer and bonding awafer comprising a MEMS device of the MEMS area over the first metallayer and the second metal layer.

According to some embodiments, a semiconductor arrangement comprises afirst metal connect adjacent a second metal connect, the first metalconnect and the second metal connect over a substrate, a first metallayer over the first metal connect such that a portion of the firstmetal layer is in contact with a top surface of the first metal connect.In some embodiments, a first oxide layer is between the first metalconnect and the first metal layer and a second metal layer is over thesecond metal connect such that a portion of the second metal layer is incontact with a top surface of the second metal connect. In someembodiments, a second oxide layer is between the second metal connectand the second metal layer. In some embodiments, a microelectro-mechanical system (MEMS) area is between the first metal layerand the second metal layer, the MEMS area comprising a MEMS device. Insome embodiments, a first wafer portion is bonded to the first metallayer over the first metal connect and a second wafer portion is bondedto the second metal layer over the second metal connect. In someembodiments, a cap is connected to a top surface of the first waferportion by a first bond and connected to a top surface of the secondwafer portion by a second bond, such that the cap goes over the MEMSarea.

The foregoing outlines features of several embodiments so that thoseskilled in the art may better understand the aspects of the presentdisclosure. Those skilled in the art should appreciate that they mayreadily use the present disclosure as a basis for designing or modifyingother processes and structures for carrying out the same purposes and/orachieving the same advantages of the embodiments introduced herein.Those skilled in the art should also realize that such equivalentconstructions do not depart from the spirit and scope of the presentdisclosure, and that they may make various changes, substitutions, andalterations herein without departing from the spirit and scope of thepresent disclosure.

Various operations of embodiments are provided herein. The order inwhich some or all of the operations are described should not beconstrued to imply that these operations are necessarily orderdependent. Alternative ordering will be appreciated having the benefitof this description. Further, it will be understood that not alloperations are necessarily present in each embodiment provided herein.Also, it will be understood that not all operations are necessary insome embodiments.

It will be appreciated that layers, features, elements, etc. depictedherein are illustrated with particular dimensions relative to oneanother, such as structural dimensions or orientations, for example, forpurposes of simplicity and ease of understanding and that actualdimensions of the same differ substantially from that illustratedherein, in some embodiments. Additionally, a variety of techniques existfor forming the layers features, elements, etc. mentioned herein, suchas etching techniques, implanting techniques, doping techniques, spin-ontechniques, sputtering techniques such as magnetron or ion beamsputtering, growth techniques, such as thermal growth or depositiontechniques such as chemical vapor deposition (CVD), physical vapordeposition (PVD), plasma enhanced chemical vapor deposition (PECVD), oratomic layer deposition (ALD), for example.

Moreover, “exemplary” is used herein to mean serving as an example,instance, illustration, etc., and not necessarily as advantageous. Asused in this application, “or” is intended to mean an inclusive “or”rather than an exclusive “or”. In addition, “a” and “an” as used in thisapplication and the appended claims are generally be construed to mean“one or more” unless specified otherwise or clear from context to bedirected to a singular form. Also, at least one of A and B and/or thelike generally means A or B or both A and B. Furthermore, to the extentthat “includes”, “having”, “has”, “with”, or variants thereof are used,such terms are intended to be inclusive in a manner similar to the term“comprising”. Also, unless specified otherwise, “first,” “second,” orthe like are not intended to imply a temporal aspect, a spatial aspect,an ordering, etc. Rather, such terms are merely used as identifiers,names, etc. for features, elements, items, etc. For example, a firstelement and a second element generally correspond to element A andelement B or two different or two identical elements or the sameelement.

Also, although the disclosure has been shown and described with respectto one or more implementations, equivalent alterations and modificationswill occur to others skilled in the art based upon a reading andunderstanding of this specification and the annexed drawings. Thedisclosure comprises all such modifications and alterations and islimited only by the scope of the following claims. In particular regardto the various functions performed by the above described components(e.g., elements, resources, etc.), the terms used to describe suchcomponents are intended to correspond, unless otherwise indicated, toany component which performs the specified function of the describedcomponent (e.g., that is functionally equivalent), even though notstructurally equivalent to the disclosed structure. In addition, while aparticular feature of the disclosure may have been disclosed withrespect to only one of several implementations, such feature may becombined with one or more other features of the other implementations asmay be desired and advantageous for any given or particular application.

What is claimed is:
 1. A semiconductor arrangement, comprising: a first metal connect adjacent a second metal connect, the first metal connect and the second metal connect over a substrate; a first metal layer over the first metal connect such that a portion of the first metal layer is in contact with a top surface of the first metal connect; a second metal layer over the second metal connect such that a portion of the second metal layer is in contact with a top surface of the second metal connect; a micro electro-mechanical system (MEMS) area is between the first metal layer and the second metal layer, the MEMS area comprising a MEMS device; a first wafer portion bonded to the first metal layer over the first metal connect; a second wafer portion bonded to the second metal layer over the second metal connect; and a cap connected to a top surface of the first wafer portion by a first bond and connected to a top surface of the second wafer portion by a second bond, such that the cap goes over the MEMS area.
 2. The semiconductor arrangement of claim 1, at least one of: the first metal layer having a first metal thickness between about 100 Å to about 7,000 Å; or the second metal layer having a second metal thickness between about 100 Å to about 7,000 Å.
 3. The semiconductor arrangement of claim 1, comprising at least one of: a first oxide layer between the first metal connect and the first metal layer; or a second oxide layer between the second metal connect and the second metal layer.
 4. The semiconductor arrangement of claim 3, comprising at least one of: a first vacancy between a top surface of the portion of the first metal layer and a first wafer portion bottom surface of the first wafer portion; or a second vacancy between a top surface of the portion of the second metal layer and a second wafer portion bottom surface of the second wafer portion.
 5. The semiconductor arrangement of claim 1, at least one of: the first bond comprising a first eutectic bond between at least one of germanium, aluminum or copper; or the second bond comprising a second eutectic bond between at least one of germanium, aluminum or copper.
 6. The semiconductor arrangement of claim 1, at least one of: the first metal connect comprising at least one of aluminum or copper; or the second metal connect comprising at least one of aluminum or copper.
 7. The semiconductor arrangement of claim 1, the cap comprising silicon.
 8. The semiconductor arrangement of claim 1, the substrate comprising a CMOS device.
 9. The semiconductor arrangement of claim 1, comprising at least one of a first metal routing connecting the first metal layer to a first I/O port or a second metal routing connecting the second metal layer to a second I/O port.
 10. A method of forming a semiconductor arrangement, comprising: patterning an initial oxide layer to form a first oxide layer over a first metal connect and a second oxide layer over a second metal connect, where the first metal connect is adjacent the second metal connect on a substrate; forming a first opening through the first oxide layer over the first metal connect, such that a top surface of the first metal connect is exposed; forming a second opening through the second oxide layer over the second metal connect, such that a top surface of the second metal connect is exposed; forming an initial metal layer conformally over the first oxide layer, the second oxide layer, the first opening, the second opening and a micro electro-mechanical system (MEMS) area between the first oxide layer and the second oxide layer, such that a portion of a first metal layer of the initial metal layer is in contact with the top surface of the first metal connect and a portion of a second metal layer of the initial metal layer is in contact with the top surface of the second metal connect; removing a portion of the initial metal layer from the MEMS area such that the first metal layer of the initial metal layer is formed over the first oxide layer and the second metal layer of the initial metal layer is formed over the second oxide layer; and bonding a wafer comprising a MEMS device of the MEMS area over the first metal layer and the second metal layer.
 11. The method of claim 10, comprising forming a first MEMS opening on a first side of the MEMS device and a second MEMS opening on a second side of the MEMS device, such that a first wafer portion of the wafer is formed on the first side of the MEMS device and over the first metal layer and a second wafer portion of the wafer is formed on the second side of the MEMS device and over the second metal layer.
 12. The method of claim 11, comprising connecting a cap over a top surface of the first wafer portion by a first bond and over a top surface of the second wafer portion by a second bond, such that the cap goes over the MEMS area.
 13. The method of claim 12, comprising at least one of: forming a first I/O port on the top surface of the first wafer portion adjacent the cap but outside of the MEMS area; or forming a second I/O port on the top surface of the second wafer portion adjacent the cap but outside of the MEMS area.
 14. The method of claim 12, comprising at least one of: forming a first squish prevention region on the top surface of the first wafer portion adjacent the cap and within the MEMS area; or forming a second squish prevention region on the top surface of the second wafer portion adjacent the cap and within the MEMS area.
 15. The method of claim 11, comprising at least one of: forming a first vacancy between a top surface of the portion of the first metal layer and a first wafer portion bottom surface of the first wafer portion; or forming a second vacancy between a top surface of the portion of the second metal layer and a second wafer portion bottom surface of the second wafer portion.
 16. The method of claim 12, the connecting a cap comprising at least one of: forming the first bond comprising forming a first eutectic bond between at least one of germanium, aluminum or copper; or forming the second bond comprising forming a second eutectic bond between at least one of germanium, aluminum or copper.
 17. A semiconductor arrangement, comprising: a first metal connect adjacent a second metal connect, the first metal connect and the second metal connect over a substrate; a first metal layer over the first metal connect such that a portion of the first metal layer is in contact with a top surface of the first metal connect; a first oxide layer between the first metal connect and the first metal layer; a second metal layer over the second metal connect such that a portion of the second metal layer is in contact with a top surface of the second metal connect; a second oxide layer between the second metal connect and the second metal layer; a micro electro-mechanical system (MEMS) area between the first metal layer and the second metal layer, the MEMS area comprising a MEMS device; a first wafer portion bonded to the first metal layer over the first metal connect; a second wafer portion bonded to the second metal layer over the second metal connect; and a cap connected to a top surface of the first wafer portion by a first bond and connected to a top surface of the second wafer portion by a second bond, such that the cap goes over the MEMS area.
 18. The semiconductor arrangement of claim 17, the substrate comprising a CMOS device.
 19. The semiconductor arrangement of claim 17, comprising at least one of: a first vacancy between a top surface of the portion of the first metal layer and a first wafer portion bottom surface of the first wafer portion; or a second vacancy between a top surface of the portion of the second metal layer and a second wafer portion bottom surface of the second wafer portion.
 20. The semiconductor arrangement of claim 17, at least one of: the first bond comprising a first eutectic bond between at least one of germanium, aluminum or copper; or the second bond comprising a second eutectic bond between at least one of germanium, aluminum or copper. 